main(List<String> args) {
  String name = "abc";
  int age = 18;
  double height = 1.88;
  //print(name);
  //print(age);
  //print(height);

  //print("{$name $age $height}");
  //print(name.runtimeType);
  //print(age.runtimeType);
  //print(height.runtimeType);

  //var aaa = "var 声明变量";
  //print(aaa);

  const b1 = "const 声明常量";
  final b2 = getNum();

  dynamic bar = "abc";
  bar = 123;
  print(bar);

}

int getNum() {
  return 10;
}
